Passageway forming sleeve



United States Patent [72] Inventor John F. Ogden 3005 Olive St.,Columbus, Ohio 43204 [21] Appl. No. 612,695 [22] Filed Jan. 30, 1967[45] Patented Aug.ll,l970

[54] PASSAGEWAY FORMING SLEEVE 10 Claims, 6 Drawing Figs.

52 u.s.c|. 137/592, 4/172, 249/150, 249/43 [51] lnt.Cl E03b11/02, E04h3/16, E04g 17/06 50 FieldofSearch 249/150,

152,183,184,186,65,l77,178;25/l28D,R,S, 128.1; 137/592; 248/356;285/226; 4/172; 249/43 Primary Examiner Daniel Blum Atmmey- Jerome R.Cox

ABSTRACT: A resiliently extendible sleeve for forming voids in moldedstructures such as for example the walls of concrete swimming pools. Thesleeve may be placed between juxtaposed mold walls where it isresiliently extended into contact with those mold walls. The preferredembodiment is a sleeve comprising two telescopically related tubeshaving a helical spring urging the sleeve to longitudinal extension.Each end of the sleeve is partially enclosed by a closure with a holetherethrough. Fluid carrying conduits may be positioned within thesleeve and extend out through the holes. The holes may be formed to matewith various conduits, couplings, and fixtures.

[56] References Cited UNITED STATES PATENTS 350,422 10/1886 Duffy285/226 1,539,550 5/1925 Emery ..25/128(D)UX 2,563,578 8/1951 Candee285/226 2,733,885 2/1956 Brownetal 248/356XR Patented Aug 11, 1970 SheetL of 3 wwwmzw/zv INVENTOR.

JOHN F. OGDEN J ATTORNEY 5 Patented Aug. 11, 19 70 SheetiofS INVENTOR.JOHN F. OGDEN A TTORNE Y Patented Aug. 11, 1970 3,523,552

Sheet 3 of3 INVENTOR. JOHN F. OGDEN BY ym 4.1

ATTORNEY vide passageways through such layers. These may be for thePASSAGEWAY FORMING SLEEVE BACKGROUND OF THE INVENTION Field Of TheInvention My invention is primarily for use in the construction and 5building industry. Its advantages are best realized when a passageway isdesired through a molded layer of concrete or similar material orstructure. For example, if a passageway is to be constructed through alayer (such as a foundation wall) of concrete, plaster, asphalt or othermoldable substance so that a fluid carrying pipe or electrical wire, forexample, will be able to pass through such a layer, my device may beused. Specifically, l invented my passageway forming sleeve to providewater inlets for a swimming pool, the inlets being positioned below thewater surface and around the periphery of the pool.

Description of the Prior Art When a contractor is constructing a moldedlayer, such as a concrete floor or a concrete vertical wall, he oftenmust pro passage of conduits for water, electricity, gas, sewage, etc.from one side of the layer to the other.

One of the least desirable methods for providing such a passageway is tosimply pour the moldable substance into a simple mold and let itsolidify. Then remove the mold and drill or chisel the passagewaythrough the wall. Obviously, this method produces an irregularpassageway which could not mate closely with any standard conduits,fixtures, or couplings. More efficient means are available for theprovision of passageways.

One of such means involves the use of a simple tube of length greaterthan the total thickness of the molded layer and the juxtaposed moldwalls. Prior to pouring the moldable substance into the mold, circularholes of diameter equal to the outside diameter of the tube, are drilledthrough the juxtaposed mold walls. The tube is inserted through theseholes so that it extends beyond the outer surfaces of the mold walls.The moldable substance is then poured into the mold and conformablysurrounds the tube. After the moldable substance solidifies, the moldwalls are removed and the ends of the tube may be cut away so that thetube does not protrude from the molded layer.

A second means for the provision of passageways through molded layersinvolves the use of a tube having outward annular flanges at each end.Such a tube is positioned between juxtaposed mold walls so that the endsof the tube and the flanges are flush with the inner surfaces of thejuxtaposed mold walls. This tube is then nailed to the mold walls bydriving several nails through the flanges into the mold walls. After themolda- 5Q ble substance has been poured and allowed to solidify, themold walls are removed. Protruding nails may then be cut away.

There are, however, several difficulties produced by the above describedmeans which create especially troublesome problems in the field ofswimming pool construction. These difficulties can best be appreciatedthrough an examination of the qualities or features desired in apassageway forming sleeve.

Ease and rapidity of installation and convenient use are desired by anycontractor. Consequently, a passageway forming sleeve which requires aminimum of manipulation to install has a highly desirable quality.

Because passageways through moldable layers are needed for such avariety of purposes, another desirable quality in a passageway formingsleeve is its adaptability to various conduits, couplings, and fittings.A sleeve should be adaptable to mate with various component parts of asystem.

Often repairs must be made or new parts introduced in a system. Thiscould necessitate demounting from the sleeve and passageway theassociated conduits, couplings, or fittings.

It is therefore a desirable quality of a passageway forming sleeve thatit permit demounting of associated parts without extensive manipulationand without destruction of the passageway or the sleeve. Furthermore,reassembly should be possible without extensive manipulation.

The sleeve should be capable of cooperating with other parts to seal thepassageway to avoid unintended leakage of water or other fluid.

Finally, one of the most desirable qualities of such a sleeve is that itbe capable of modifying itself to compensate for a change in the moldwalls. When a moldable substance is poured into a mold, the weight ofthe moldable substance tends to separate juxtaposed mold walls. The rodsare commonly used to deter this tendency. in spite of the use of tierods, some separation will occur. Consequently, it is desirable that asleeve be extensible so that it is at least as long as the distancebetween the mold walls after they separate.

A simple tube inserted through holes in juxtaposed mold walls, asdescribed above, requires considerable manipulation. l-loles which arethe same size as the outside diameter of the tube must be drilled inmold walls to install this tube. When the molds are removed, part ofthis tube must be cut away to make the tube ends flush with the moldedlayer surfaces. Because the ends of this simple tube must be cut awayafter installation, the tube ends may not be specially formed to matewith associated conduits, couplings and fittings. Because the ends ofthe tube may not be formed to mate with other associated parts,demounting, remounting, and sealing become more difficult. It is commonpractice for contractors to lease forms from suppliers. The contractoris charged in proportion to the damage and destruction of the forms.Holes as large as the outside diameter of a sleeve cause substantialdamage to the forms. Small holes are not objectionable.

When the tubular sleeve having annular end flanges is used, such asleeve must be manufactured so that its length equals the exact width ofthe desired molded layer. Further extensive manipulation is required tonail this sleeve to the mold walls and to remove the protruding nailsfrom the layer after the 5 mold walls have been removed. Nailing wouldbe impossible where the mold walls are close together. Furthermore, thisflanged sleeve is incapable of extending whenever the mold wallsseparate. Therefore, if the walls separate, the sleeve ends will berecessed within the molded layer.

Objects It is therefore an object of my invention to provide improvedmeans for forming a passageway through a molded layer.

A further object of my invention is to provide a passageway formingsleeve requiring very little manipulation to install.

A further object of my invention is to provide a passageway formingsleeve to which associated conduits, couplings, and fittings may beconveniently, demountably and replaceably attached.

A still further object of my invention is to provide a passagewayforming sleeve which expands or contracts to remain in contact withjuxtaposed mold walls.

A still further object of my invention is to provide a passagewayforming sleeve which may be manufactured to have portions formed to matewith a particular conduit, coupling, or fitting.

Yet a further object of my invention is to provide a sleeve which may beinstalled with minimal destruction of the mold wall.

Yet a further object of my invention is to provide a sleeve whichpermits use of non-corrosive conduits, fixtures, and couplings.

SUMMARY OF THE lNVENTlON The invention relates to a device for formingvoids through molded structure and more particularly relates to a sleevewhich is resiliently urged into extension or contraction to maintain itsends in contact with juxtaposed mold walls used to form the moldedstructure.

The resiliency of such a sleeve maintains the ends of the sleeve in aposition contiguous to the mold walls even if the mold walls move apartdue to the pressure exerted by a moldable fluid poured into the mold ormove inward as the setting moldable material contracts. Additionally,the ends of the sleeve may be partially enclosed by closures which maybe formed to mate with other couplings and fixtures so that othercouplings, fixtures and conduits may be detachably connected to andthrough the sleeve and therefore through the molded structure.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. I is a view in perspective of astructure, specifically a swimming pool, showing the nozzles at theinner ends of preferred embodiments of my invention which serve as waterinlets for the swimming pool. Only the nozzle portions of the inlets areexposed in FIG. 1.

FIG. 2 is a view in section of the structure of FIG. 1, takensubstantially along the line 2-2 shown in FIG. I, of a water inletconstructed according to the preferred embodiment of my invention, andshowing its position in the swimming pool wall.

FIG. 3 is a view in section showing the detail of a water inletconstructed according to the preferred embodiment of my invention andpositioned in a molded wall after said mold wall is set.

FIG. 4 is an exploded view of the preferred embodiment of my invention.

FIG. 5 is a view in section of an alternative embodiment of myinvention.

FIG. 6 is a view in side elevation showing the preferred embodiment ofmy invention in position between two mold walls.

In describing in the specification, the preferred embodiment of theinvention illustrated in the drawings, specific terminology will beresorted to for the sake of clarity. However, I do not intend it to belimited to the specific terms so selected, and it is to be understoodthat each specific term includes all technical equivalents which operatein a similar manner to accomplish a similar purpose.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Structure FIG. I shows aswimming pool, indicated generally by l. The pool comprises a base 3,inner pool walls 5 and 7 (only two of four visible), outer walls 9 and11 (only two of four visible), a deck 13, and a splash trough 15. Aplurality of inlet nozzles such as nozzles 17 are visible around theinner walls of the pool.

FIG. 2 shows the swimming pool base 3 embedded in the soil 4, an innerpool wall 7, an adjacent inner pool wall 8, an outer wall 9, and thedeck 13.

Positioned below the deck 13 (See FIG. 2) is a water supply pipe 21which surrounds the inner pool walls below the deck. Water is carriedfrom the supply pipe 21 to my passageway forming sleeve, indicatedgenerally by 22, through an elbow 23, a conduit 25, and a fitting 27. InFIG. 2 the sleeve 22 is seen generally to comprise two telescopicallyrelated tubes, an inner tube 31 and an outer tube 33. A helical spring35 encircles the inner tube 31. The nozzle 36 protrudes from the innerpool wall 8 adjacent to the end of the sleeve 22. A splash trough returngutter 38 is also shown but is not a necessary part of this embodiment.I prefer that the supply pipe 21, the elbow 23, the conduit 25, and thefitting 27 be constructed of a non-corrosive material.

FIG. 4 is an exploded view showing a nozzle 36, an "0 ring 39 and partsof the preferred embodiment of my invention. The inner tube 31 ofthe twotelescopically related tubes has an outward annular flange 41, and anend closure 43 having a round hole 45 therethrough. The outer tube 33 ofthe two telescopically related tubes has an outward annular flange 51and an end closure (not visible in FIG. 4) having a square hole 55therethrough. The helical spring 35 is positioned to encircle the innertube 31. One end of the spring seats against the flange 41 on the innertube, and the other end seats against the rim 57 ofthe outer tube 33.

Although the nozzle 36 is shown in more detail in FIG. 3 and FIG. 5,FIG. 4 shows that the nozzle 36 has a threaded passage 61, a protrudingsquare boss 63, and a concentric circular groove 65.

FIG. 3 shows the preferred embodiment of my sleeve assembled and inposition in the swimming pool inner wall. A portion of the wall 8 isalso shown. The inner tube 31 is telescopically positioned within theouter tube 33. The flange 41 and the closure 43 of the inner tube 31 arealso shown. The outer tube 33 has the flange 51 and the closure 53. Thespring 35 is shown seated against the flange 41 and the rim 57 of theouter tube. Both the flange 51 and the flange 41 additionally serve tostabilize the sleeve within the concrete.

The nozzle 36 and the other fixtures, fittings, and conduits shown inFIG. 3 are suggested for use when an embodiment of my invention is usedin swimming pool construction. However, it should be clear that otherfixtures, fittings, and conduits may be used with my invention by makingobvious variations in the preferred embodiments.

In FIG. 3, a conduit 71 is shown positioned centrally within theassembled sleeve and extending through the square hole 55 in the closure53 and the round hole 45 in the closure 43 at the respective ends of thetubes 33 and 31. One end of the conduit 71 is threadedly engaged to thenozzle 36. At the other end a jam nut 73 is threadedly secured to holdthe nozzle 36 against the closure 53.

The nozzle 36 has a passage 61 and a bore 75 for the passage of waterfrom the conduit 71, through the passage 61, and out the bore 75 intothe pool. The nozzle 36 mates with the sleeve by means of theconformable positioning of the square boss 63 within the square hole 55in the closure 53.

The 0" ring 39 fits within the circular groove 65 of the nozzle 36 andis sealingly compressed between the closure 53 and the nozzle 36. The Oring prevents leakage of water from the pool through the sleeve. Themating of the square boss 63 and the square hole 55 preventsunauthorized removal of the nozzle 36 from the conduit 71 from withinthe pool.

The material of which the inner tube 31 and the outer tube 33 areconstructed could be metal, cardboard, ceramic, plastic, or any othersuitable material. However, I prefer that both tubes, both flanges, andboth closures be constructed of a synthetic plastic material. All partsof my sleeve may be manufactured in a single injection mold.

FIG. 5 shows an alternative embodiment of a passageway forming sleeveaccording to my invention. This alternative sleeve is designated 101 andis a corrugated, circular tube. The tube has a series of circumferentialcoaxial corrugations. One end of the tube is terminated with a closure143 having a circular hole 145 therethrough. The other end is terminatedwith a closure 153 having a square hole 155 therethrough. The nozzle136, conduit 171, and jam nut 173 are attached to the corrugated sleevein the same manner as the nozzle 36, conduit 71 and nut 73 of theassembly shown in FIG. 3.

The corrugated sleeve must be made of an elastic material, such assteel, rubber, or plastic, so that it will be resiliently compressibleand extendible.

FIG. 6 shows the passageway sleeve 22 illustrated in FIG. 3 butpositioned in the concrete pool wall 8 between two mold walls 81 and 82.

Operation and Advantages The advantages of my invention become apparentwhen the formation of a molded layer with a passageway therethrough isdesired.

A molded layer is generally a solid body that is formed by pouring afluid material into a mold and then allowing or causing the fluid tochange to a solid.

A mold is a fluid container of a desired shape comprising a plurality ofmold walls. Any portion of the container may be termed a mold wall.juxtaposed mold walls could be any two portions of the container whichmay have the moldable substance between them.

Common molded layers are the floors, ceilings, and walls of a building,highways, and swimming pool walls and bottoms. The mold used to formthese molded layers usually comprises two parallel, planar structures, abottom, and ends.

For clarity in describing the operation of an embodiment of myinvention, I shall describe its operation when used to form a passagewaythrough a vertically oriented layer formed between two parallel planarmold walls. However, it should be clear that use of my inventionrequires neither parallel nor planar mold walls. It may be used withmost mold configurations. l begin with the assumption that a contractorhas constructed two parallel, planar mold walls, such as walls 81 and 82in FIG. 6, separated by a distance approximately equal to the desiredthickness of the molded layer. These planar mold walls may be wooden.The contractor obtains the preferred sleeve shown in FIG. 4. The spring35 is placed on the inner tube 31, and the end of the inner tube 31 isinserted into the end of the outer tube 33. The length of the sleeve,when the spring is not compressed but is seated against the flange 41and the rim 57, must be greater than the distance between the juxtaposedmold walls (i.e. greater than the desired wall thickness).

At the position where the passageway through the molded layer isdesired, a hole 84 is drilled transversely through both juxtaposed moldwalls. The preferred sleeve is then compressed and positioned betweenthe juxtaposed mold walls so that the holes drilled in the mold wallsare in substantial alignment with the round hole 45 and the square hole55 of the sleeve.

A rod 86 may then be inserted so that it passes through all the alignedholes. This rod will hold the sleeve in the desired position. The holedrilled in the mold walls need be of no particular size. lts size is notdetermined by a sleeve dimension or a fixture coupling, or conduitdimension. It must only be large enough to permit insertion of the rod.The only dimensional requirement of the rod is that it be small enoughto permit insertion through the aligned holes. Such small holes do notcauseappreciable destruction of the forms.

The moldable substance, such as concrete, is poured into the mold andallowed to solidify.

The rod is then merely pulled from its position, and the mold walls areremoved. The sleeve is ready for attachment of the fitting, couplings,and conduits desired. Completely avoided are the steps of fixing thesleeve to and detaching the sleeve from the mold walls. When the moldwalls are removed, there is no protrusion of the sleeve from the moldedlayer. The end closure portions 53 and 43 (FIG. 3) are flush with thesurface of the molded layer. Any separation of the mold walls thatoccurred during pouring was followed by an equal extension of my sleeveso that the outer surfaces of the closures 43 and 53 were maintainedcontiguous to the inner surfaces of the mold walls and flush with thesurfaces of the moldable substance. Any contractions of the molded layerare followed by an equal contraction of my sleeve. Because the closures43 and 53 are always maintained flush with the surfaces of the moldedlayer and will not be cut away, the closures may be formed into desiredshapes before positioning of the sleeve in the molded substance. Theshape may be any shape desired in order to allow a mating of the sleevewith the attached conduits, fixtures, and couplings. l use a square bossand hole as described above to prevent removal of the nozzle of my poolinlet. Other shapes desired could be formed on these closures.

If the construction process described above were for a swimming poolwall, the contractor would then place the 0" ring 39 in the groove 65 ofthe nozzle 36, screw the conduit 71 into the threaded passage 61 in thenozzle, position the conduit 71 longitudinally within the sleeve, andtighten the jam nut 73 onto the conduit 71. The conduit 71 is thenattached to the supply pipe 21 as shown in FIG. 2 as described above.

Because the end closures 43 and 53 of my sleeve may be custom made forparticular couplings, fittings, and conduits, and because no moldablesubstance has hardened in contact with any fixture, coupling or conduit,the fixtures, couplings and conduits may be easily detached, removed, orreplaced.

There are other embodiments of my invention. The sleeve could comprisemore than two telescoping tubes. An alternative resilient means could beemployed. The holes in the end closures could be made after the sleevehas been installed in the molded layer. The spring could be within thesleeve.

There are three essential elements in the sleeve I have invented. First,there must be a portion of the sleeve which has an outer surface. Thisfirst outer surface will, when the sleeve is placed in the mold, seatagainst the inner surface of one mold wall and will be flush with thesurface of the molded layer. Second, there must be a second portion ofthe sleeve which likewise has an outer surface. This second outersurface will similarly seat against a mold wall and be flush with thesurface of the molded layer. Third, there must he means for resilientlyurging these two outer surfaces in opposite directions so that theirposition relative to the mold walls and the molded layer surfaces willbe maintained if the distance between the mold walls varies.

The embodiment shown in FIG. 5 and described above has these essentialelements, yet is quite different from the other embodiment shown. In theembodiment of FIG. 5, the elasticity of the material from which thesleeve is constructed provides the resiliency. The corrugations increasethis resiliency. The end closures 143 and 153 are similar to the endclosures 43 and 53 of FIG. 3. The outer surfaces of closures 143 and153, like the outer surfaces of closures 43 and 53, seat against themold walls and are flush with the surfaces of the molded layer.

Therefore, it is to be understood that while the detailed drawings andspecific examples given describe preferred embodiments of my invention,they are for the purposes of illus tration only, that the apparatus ofthe invention is not limited to the precise details and conditionsdisclosed, and that various changes may be made therein withoutdeparting from the spirit of the invention which is defined by thefollowing claims:

lclaim:

1. A device for providing a passageway through a molded wall comprisinga telescopic sleeve for forming voids in a moldable substance whereinthe sleeve comprises (1) a first hollow tube having one end open andhaving the opposite end partially closed by a first closure having asubstantially concentric opening formed therein, the first hollow tubehaving a longitudinal first passageway therethrough communicating withsaid concentric opening;

(2) a second hollow tube complementary to said first tube but having asmaller diameter than the first tube, also having one end open andhaving the opposite end partially closed by a second closure having asubstantially concentric opening formed therein, the second hollow tubehaving a second passageway therethrough communicating with said openingin said second closure, and having its open end slidably telescopedsnugly within the open end of the first hollow tube with said secondpassageway communicating with said first passageway; and

(3) resilient means comprising a spring bearing effectively on both ofsaid hollow tubes to urge them in opposite directions tending to removethe second hollow tube from telescoping arrangement within the firsthollow tube.

2. A mold for forming walls of moldable substances and to providepassages therethrough, the mold comprising;

(1) a first mold wall, having a first transverse hole therethrough, formolding one surface of a wall of said moldable substance;

(2) a second juxtaposed mold wall, having a second transverse holetherethrough in substantial alignment with said first hole for moldingthe opposite surface of a wall of said moldable substances; and

(3) a sleeve located within the confines of the mold walls andsubstantially aligned with the holes, having a width substantiallylarger than the holes and having (a) a first end portion of said sleevewhich first portion includes a first outer surface formed on a firsttransverse end wall, said first outer surface positioned adjacent tosaid first mold wall with the first transverse end wall engaging one ofthe mold walls;

(b) a second, opposite, end portion of said sleeve which second portionincludes a second outer surface, formed on a second transverse end wall,said second outer surface positioned adjacent to said second mold wallwith the second transverse end wall engaging the other of the moldwalls;

(c) a spring means for resiliently urging said first portion and saidsecond portion in opposite longitudinal directions; and

(d) means cooperating with said holes and said sleeve to preventsubstantial lateral movement of the sleeve relative to the mold walls;

whereby said first outer surface and said second outer surface areoppositely forced and held adjacent to said first mold wall and saidsecond mold wall by said spring means.

3. A mold for forming walls of moldable substances and to providepassages therethrough, the mold comprising:

(1) a first mold wall for molding one surface of a wall of said moldablesubstances;

(2) a second spaced juxtaposed mold wall for molding the oppositesurface of a wall of said moldable substances; and

(3) a passageway forming sleeve having (a) a first end portion of saidsleeve, which first portion includes a first outer surface, said firstouter surface positioned adjacent to said first mold wall;

(b) a second, opposite, end portion of said sleeve which second portionincludes a second outer surface, said second outer surface positionedadjacent to said second mold wall the sleeve having a passageway whichextends from said first outer surface to said second outer surface; and

(c) a spring means for resiliently urging said first portion and saidsecond portion in opposite longitudinal directions whereby said firstouter surface and said second outer surface are oppositely forced andheld adjacent to said first mold wall and said second mold wall by saidspring means.

4. A telescopic sleeve for forming voids in a moldable substancecomprising:

(l) a first portion of said sleeve having a longitudinal firstpassageway therethrough, which first portion includes a first outersurface at one longitudinal extremity of said sleeve, the first portionbeing part of a first tube having an end closure with a holetherethrough terminating the tube at a first end and having a firstexternal annular flange intermediate its ends;

(2) a second portion of said sleeve having a second passagewaytherethrough communicating with said first passageway and in slidabletelescopic relation to the first portion, which second portion includesa second outer surface at the other longitudinal extremity of saidsleeve the second portion being a part of a second tube having an endclosure with a hole therethrough terminating an end, telescopically andslidingly surrounding said first tube at the end opposite said first endof said first tube and having a second external annular flange; and

(3) means for resiliently urging said first outer surface and saidsecond outer surface in opposite directions including means forresiliently urging said first tube and said second tube in oppositedirections, said means seating against said first annular flange andsaid second tube.

5. A fluid transporting structure for conveying a fluid through amoldable wall, the structure comprising:

(1) a telescopic sleeve for forming voids in a moldable substance, thesleeve comprising:

(a) a first portion of said sleeve having a longitudinal firstpassageway therethrough, which first portion includes a first outersurface at one longitudinal extremity of said sleeve;

(b) a second portion of said sleeve having a second passagewaytherethrough communicating with said first passageway and in slidabletelescopic relation to the first portion, which second portion includesa second outer surface at the other longitudinal extremity of saidsleeve;

(c) means for resiliently urging said first outer surface and saidsecond outer surface in opposite directions wherein the telescopicsleeve comprises a tubular conduit, comprising a plurality of coaxialtelescopic tubes, having at each opposite end of said conduit a closurewith a hole therethrough partially enclosing each opposite end of saidconduit, one closure including said first outer surface and the otherclosure including said second outer surface;

(2) a fluid pipe positioned longitudinally within said conduit;

(3) nozzle means connected to one end of said pipe; and

(4) fluid transporting and supply means connected to the other end ofsaid pipe.

6. The structure of Claim 5 wherein annular flanges are attached to theexterior of said conduit.

7. The structure of Claim 5 wherein the wall of one end of said conduithas a polygonal hole therethrough and wherein said nozzle means has aboss extending therefrom which has a shape complementary to said holewhereby said boss may be fittingly inserted in said hole to preventrotation of said nozzle means.

8. The fluid transporting structure of Claim 5 wherein (1) said tubularconduit comprises two telescopic tubes of circular cross section, oneend enclosed by a closure with a circular hole therethrough, the otherend enclosed by a closure with a square hole therethrough, and each ofsaid two tubes having an annular flange;

(2) said resilient means is a helical spring, coaxial with said tubularconduit;

(3) said fluid pipe has threaded ends;

(4) said nozzle means has a circular, planar, base portion having acircular groove concentrically therein and having a square bossprotruding therefrom mating into said square hole, and wherein saidnozzle means is threadedly connected to said fluid pipe; and

(5) a circular sealing ring is compressed between said circular grooveand said closure having a square hole therein.

9. A device for providing a passageway through a molded wall comprising:

(1) a hollow tube having one end open and having the opposite endpartially closed by a closure forming a first outer surface at onelongitudinal extremity of the sleeve, the closure having a substantiallyconcentric opening formed therein;

(2) a second hollow tube complementary to said first tube but having asmaller diameter than the first tube, also having one end open andhaving the opposite end partially closed by a closure forming a secondouter surface at the other longitudinal extremity of the sleeve, theclosure having a substantially concentric opening formed therein andhaving its open end telescoped snugly within the open end of the firsthollow tube; and

(3) a helical spring surrounding said hollow tubes and bearingeffectively on both of said hollow tubes comprising means to resilientlyurge said first outer surface and said second outer surface in oppositedirections and tending to remove the second hollow tube from telescopingarrangement within the first hollow tube.

10. A fluid transporting structure for conveying a fluid through amoldable wall, the structure comprising:

(1) a tubular conduit, comprising a plurality of coaxial telescopictubes, having at each opposite end of said conduit a closure with a holetherethrough partially enclosing each opposite end of said conduit;

(2) resilient means for resiliently urging said telescopic tubes apartin a coaxial direction;

(5) fluid transporting and supply means connected to the other end ofsaid pipe.

" UNITED STATES PATENT OFFICE 6 CERTIFICATE OF CORRECTION Patent No.3523552 Dated gust 11, 1970 InventorM/l John F. Ogden It is certifiedthat error appears in the above-identified patent and that said LettersPatent are hereby corrected as shown below:

Column 2, lines 8 and 9 should read Tie rods are commonly used... ratherthan "The rods are commonly used.

SIGNED M RENE OCT 271970 .SEAL

Attest:

Edward M. Fletcher, Jr. W I, m, a, Amsfing Gal-185E116! (if

